Ntawm qhov zoo ntawm aramid fibers piv rau carbon fibers

Tam sim no, nyob rau hauv lub tshav pob ntawm cov ntaub ntawv tshiab, aramid fibers thiab carbon fibers yog dav siv raw cov ntaub ntawv. Txawm hais tias ob qho tib si muaj lub zog tensile siab thiab modulus, muaj ntau qhov sib txawv ntawm kev ua haujlwm thiab kev siv. Yog li dab tsi yog qhov txawv ntawm qhov tshwm sim?
Cov pa roj carbon fiber ntau yog lub zog siab thiab siab modulus fiber ntau nrog cov ntsiab lus carbon ntau dua 90%. Nws muaj cov yam ntxwv xws li kub tsis kam, kev sib txhuam tsis kam, conductivity, thermal conductivity, thiab corrosion kuj. Nws cov tsos yog fibrous, mos, thiab tuaj yeem ua tiav rau hauv ntau yam ntaub. Nyob rau hauv cov nqe lus ntawm kev siv, nws yog tsuas yog tsim los rau hauv cov khoom siv ntxiv rau cov khoom siv dav hlau, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, cov ligaments thiab lwm yam khoom siv hloov lub cev, nrog rau cov khoom siv high-tech khoom rau kev tsim foob pob hluav taws casings, lub cev muaj zog ships, industrial. robots, automotive panels thiab lwm yam.
Aramid yog ib hom tshiab ntawm high-tech hluavtaws fiber ntau, uas kuj muaj cov khoom zoo xws li ultra-siab zog, siab modulus, kub tsis kam, acid thiab alkali tsis kam, thiab lub teeb yuag. Ntawm 560 degree, nws tsis decompose los yog yaj, muaj kev rwb thaiv tsev zoo thiab kev laus, thiab muaj lub neej ntev. Aramid fiber ntau yog cov khoom siv tseem ceeb heev rau kev tiv thaiv hauv tebchaws thiab kev lag luam tub rog, uas yog qhov tsim nyog rau kev xav tau ntawm kev ua tsov rog niaj hnub no. Nws kuj tau siv dav hauv ntau yam ntawm kev lag luam hauv lub tebchaws, xws li aerospace, electromechanical, kev tsim kho, tsheb, khoom siv ua kis las, thiab lwm yam. Tam sim no, txog 7-8% ntawm cov khoom siv aramid yog siv rau cov tsho tiv thaiv phom, kaus mom hlau, thiab lwm yam. ., thaum aerospace cov ntaub ntawv thiab cov ntaub ntawv kis las suav txog li 40%; Cov ntaub ntawv xws li cov log tsheb thiab cov khoom siv conveyor suav txog li 20%, thiab cov hlua muaj zog muaj zog txog li 13%.
Txawm hais tias ob qho tib si tam sim no yog cov khoom siv txhawb nqa nrov tshaj plaws, tseem muaj qee qhov sib txawv hauv lawv qhov kev ua tau zoo, feem ntau tshwm sim hauv
1. Nyob rau hauv cov nqe lus ntawm txhua yam khoom, lub tensile lub zog ntawm aramid tuaj yeem ncav cuag 2815Mpa, elastic modulus yog 126Gpa, lub elongation ntawm tawg yog 2.5%, thiab qhov ceev yog 1.44g / cm ^ 3, uas yog me ntsis inferior rau lub zog ntawm carbon fiber ntau. Txawm li cas los xij, qhov tseem ceeb ntawm aramid yog nws qhov cuam tshuam tsis kam, siab dua elongation, thiab sib dua.
2. Nyob rau hauv cov nqe lus ntawm stability, aramid muaj zoo thermal stability, uas yuav decompose tsis deformation nyob rau hauv high kub. Nws tuaj yeem siv tau ntev ntawm 180 degree, thiab nws lub zog thiab kev hloov pauv tsis hloov tom qab ib lub lim tiam ntawm 150 degree. Cov coefficient ntawm thermal expansion yog -2x10 ^ -6. Piv nrog rau aramid, carbon fiber kuj muaj superior thermal stability.
3. Hais txog cov khoom siv thermochemical, aramid muaj kev tiv thaiv zoo rau kev tshaj tawm thiab muaj zog tiv thaiv cov tshuaj nruab nrab. Txawm li cas los xij, nws yooj yim corroded los ntawm muaj zog alkalis thiab acids, uas yog me ntsis inferior rau cov thermochemical zog ntawm carbon fiber.
Txawm li cas los xij, piv rau carbon fiber, aramid fiber kuj muaj lwm yam zoo:
1. Aramid fibers yog non-conductive, thiab thaum siv rau kev txhawb nqa zoo ib yam li cov pob zeb ua vaj tse, tsis tas yuav xav txog kev txwv xws li yuav tsum tau cais tawm ntawm cov hlau tuav.
2. Cov pa roj carbon fiber ntau tsis tshua muaj shear tsis kam thiab ua rau tawg. Kev tsim kho chamfer radius yuav tsum tsis pub tsawg tshaj 20mm, thiab tsuas yog ib nrab (10mm) ntawm aramid yog xav tau.
3. Lub elastic kom zoo dua ntawm aramid yog nyob rau hauv nws lub peev xwm los tiv thaiv dynamic loads thiab lub zos cuam tshuam quab yuam. Nyob rau hauv cov nqe lus ntawm kev khiav hauj lwm thaum lub sij hawm tsim kho, aramid yog undoubtedly cov khoom tsim nyog tshaj plaws.
Hom kev ua tsis tiav tom qab carbon fiber reinforcement yog nkig yam tsis muaj cov cim qhia pom tseeb, yog li, raws li kev tsim qauv, yuav tsum tau txais kev pom zoo ntawm kev nyab xeeb loj dua. Txawm li cas los xij, elastic modulus ntawm aramid fiber ntau daim ntaub yog tsawg thiab elongation yog siab. Los ntawm kev sim, nws tau raug pov thawj tias cov txheej txheem tsis ua hauj lwm ntawm cov pob zeb ua kom puas tsuaj ntxiv nrog aramid fiber ntau daim ntaub tseem yog yas thaum thauj khoom dua.
Hauv cov ntsiab lus, piv rau carbon fiber, aramid muaj zog me ntsis thiab cov khoom siv tshuaj lom neeg, tab sis nws lwm yam ntxwv tau nthuav dav nws daim ntawv thov. Piv txwv li, aramid fibers tsis yog-conductive, yog li nws yog pom tseeb tias tsis tsim nyog siv cov pa roj carbon fiber ntau hauv cov qauv nrog ntau cov khoom siv hluav taws xob xws li subways thiab cov nroj tsuag kev lag luam. Tsis tas li ntawd, thaum carbon fiber yog siv los ntxiv dag zog rau cov pob zeb, nws yog ib qho tsim nyog los xyuas kom meej tias nws raug cais tawm ntawm cov hlau tuav los tiv thaiv electrochemical corrosion, thiab kev siv aramid fibers tsis txwv los ntawm tus mob no. Tsis tas li ntawd, cov pa roj carbon fiber ntau tuaj yeem siv rau kev txhawb nqa lub tsev nrog cov khoom ruaj khov. Rau ductile reinforcement nyob rau hauv dynamic loads thiab cov kev cuam tshuam hauv zos, aramid fiber cov ntaub ntawv yog undoubtedly qhov zoo tshaj plaws kev xaiv rau nquag vibration nyob rau hauv txoj kev thiab choj teb.